Jack



July 3,119.28'. H. H. FROST JACK I Filed Dec. 1, 1924 llllllflllal=w Patented July 3, 1928.

HERBERT H. FROST, OF CHICAGO, ILLINOIS, ASSIGNOR,

BY MESNE ASSIGNMENTS, TO

CHICAGO TELEPHONE SUPPLY COMPANY, OF ELKHART, INDIANA, A CORPORATION OF DELAWARE.

JACK.

Application led December 1, y1924. Serial No. 753,033.

My invention relates to telephony, more particularly to an improved jack, which while not limited to a particular use or purpose is especially suitable for use in connection with radio receiving instruments and its objects are the provision of a jack which will lend itself to all panel, table and other mountings and one that may be used to support a shelf, bracket or sub-panel for sup`A porting or mounting the transformers, tube sockets or other parts of the instrument.

The device which I provide is also adapted to have a plurality of angularly related panels or plates secured to and connected through it.

In order to make the structure as simple and inexpensive as possible, I have arranged to use a minimum number of standard parts. The device permits the use of short leads, allows of close proximity of the parts and makes for compactness, simplicity and accessibility. Its structure is simple and relatively inexpensive and is standardized for diderent mountings and for different shelf orsub-panel supporting or different panel connecting purposes.

To acquaint those skilled in the art with the construction and manner of practicing my invention, I shall now describe a particular embodiment of the same in connection with the accompanying drawings, in which:

Figure l is a top plan view of a jack embodying my invention the spring arrangement of which is adapted for an audio frequency circuit;

Fig. 2 is a bottom plan view of the saine;

Fig. 3 is a side elevational view of a Jack embodying my invention which employs a spring arrangement used in jacks of the double circuit type;

Fig. ll is a rear end View of the embodiment shown in Fig. 3;

Fig. 5 is an enlarged vertical section. taken on line 5-5 of Fig. 1 with the addition of certain other element showing the practical mounting of the jack; and

Fig. 6 is a side elevational view of the modification illustrated in Fig. 3 showing two angularly related panels or plates secured to the jack and connected therethrough.

Referring to the drawings, the device shown comprises an angular jack frame 5 having a base 6 and a thimble leg 7.

Between its ends the base 6 has an odset portion 8 forming a seat 9 for the contact springs l0 which are mounted on said seat. Strips 12 of insulation are interposed between and insulate the contact springs 10 from each other and these strips and the contact springs have registering openings for the reception of screws 15 for securing the contact springs and insulating strips together and firmly upon the seat 9. The screws 15 extend through registering openings in the spring contacts and intervenin' insulating strips and through the seat 9, and are insulated from all of the contact springs 10 except the frame spring to which their connection through the jack frame is immaterial because of their insulation from the other springs. The frame spring may be clamped directly to the jack frame. The screws l5 have threaded engagement at 17 with tapped openings through the seat 9 and passing through said seat have threaded engagement with nuts 18 which thereby form lock nuts for preventing accidental loosening or displacement of the screws.

The nuts 18 lie on the odset portion 8 and the depression 19 formed thereby positions the nuts 18 below the surface 2O of the base 6, so that the base 6 may be secured, for example, to a plate, table or generally horizontal panel 22 as shown in Fig. 6 or, with the jack frame in inverted position, a shelf or sub-panel 23 may be mounted upon and supported by the base 6 as shown in Figs. 3, 4 and 5, without the screws 15 or nuts 18 interfering in any case with the mounting and supporting functions of the base 6. If the nuts 18 are omitted, the odset portion 8 allows the screws to project through the seat 9 which invariably results and would otherwise interfere with the mounting and supporting functions of the base 6.

On each side of the odset portion 8, the base 6 has means in the form of a tapped opening 25 for fastening the base 6 to a panel or plate, or a panel or plate to the base, as desired, suitable screws 26 extending through the plate or panel and having threaded engagement with tapped openings 25 for this purpose. The heads of the screws 226 are preferably countersunk in the panel or plate orother member which the jack supports, or upon which it is mounted, so as not to interfere With the mounting or supporting functions of said other platen l The-thimble leggfM has atapped or internally threaded opening 28. The contact or conducting thimble orsleeve 29 has an outer threaded end 30 a radial flange 3l, andan inner threaded end which is screwed or threaded into the opening 28 until the flange 31 is brought up tightly against leg 7 Then, by riveting or headingover theinneraend of the thimble vas shown at 82, the thinible js' seg-,tired iiinily andirigidlyin place inthe 6g r '1 zml. 1 .l In hanging the jack frame upon a panel oriinsecuring a panelr or plate to leg 7,1the

. outer end oifthe thimble .is passed through ring )the `surface-of the .panel 36 .and where' the panel visthinner,:additional Washers may beemployed between. thepanel and .nut to properlyrbindtlie. jack in place and atthe Sametime permit the nut 38 tov be positionedoutwardly onl the thimble, so that there Will benoappreciable partof the outer threaded end-,uncovered and .thereby subject :to inarring and-'distortion of its threads.

l. To minimize the eiiect'oi y`rregularities in the-sinner. surface-of the nut.: 88 and irregularities betweenthe parts .in crooking -the position .lofiy ythe jack frame, I recessor .re`v

lieve'theuouter, portion. ofthe inner surface ofA the nut38, leaving` a `relativelysniall cen-f.

trall annulartlip .or yhub .L10-for cosopcration with thegvvasher 39. .The fixed positioniollf theythimbleu29. in leg 7 gives that thimble a definiteposition with respect to thetip'or plugtspring,regardless or tlie mounting or thickness oi the paneli.' iThe nut 3 8-, ad-- justablealong the vthinible inno-,operation With fthe A.legi 7, `provides forbindingfthe frame: iirmiy in place Without adjusting thexfposition v.ofthe tliimble Which is .thereby of substantially lixedfposition` and substantially fixedilength for all purposes, sothat upon .properly positioningthe hill and valleyo the plug spring, said4 hillv and valley. Will have proper co-operation 'with the hilland valleyotthe pugltip-r'egardess oftheinstallation. Ther-outer end ofnthe thimble 29 constitutes a stop for limiting the insertion of the plug and by the mounting arrangement described, this stop has a delinite, iiXed position for all installations and regardless of the thickness of the panel.

Iii-Figs. 3, 4 and 5 I have shoWnthe jack frameV hung by itsr leg 7 in-'inver-tedposition .upon the upright panel 36, With a plate, shelf or-subfpanel 23mounted uponthe base (i.` vThis permits inountiiigtlieftran'sioriiiers, tub'ei'sockets or any or' allt-herpartsupon lthe plate or panel 23 with a resulting coin pactness and close proximity of the parts and*permittingavshort@leads or connections between the element or elements on the panel 23 vand thefcontact springsflO, which is highly desirable:4 InfFiga SI have'shown a trans former 50l mounted upoiif the panel 23'fan'd connected by leads 52'to Vthe-contact springs 10,A `the particular springcontact arrangement shown inlFigrS being illustrative"oil a double circuit jack for inserting a vset 2 ot head telephones and opening or. disconnecting the transformer from 'the'iplate ',circu'it,

for example-.1 rlhe inverting ofkthe: jack frame andmounting o'f- 'the element 50.di* rectly thereon, eliminates' additionalmounting brackets .and it -sliouldi be noted that the terminals olf-binding posts of the element 59 are thereby positioned close to theterniinals otli'e'contact springs 10; flff -f I'haveshowninfdotted lines at 55 a plug member insertedrinto-Lthe jackathimble 'or Fi'gfv, and the sleeve andtip springs of the'spring contact arrangement :employed as spreadout so las ttoubreak the vcontact at 56 andl 57 and at :the sameltiin'e'fplace the plug '55"in`y lseries .Wit-h: the circuit, soi that an instruinenttconnected ..to; the. plug may be insertedA in seriesr inf: the receiving circuit which includes the jacln.` 11. 1T he particular sp ring: contact arrangement is, of course,immaterial andfinay `be :varied as "desirednvithin tlierscope of myl ypresent inventionto-A suitithe particular purpose to which the jackie to lie-placed.` :In F ig. 5, for..feXainple,I have shownxanother spring contactzarrangenient inrwhiclr insertion of theplugconnects itl in: circuit with the' receiving circuit including the jack, and :at tliexsametime breaks contact:- at 60 and makes contact at 61.- The formation. of vthe VVfann'ed terminals162-of'the contact springs should, however, be noted. f These extend longitudinally of the spring contacts-andLareQdiS- posed at one side thereof, so -that bymerely turning the contact springs voverin as-v sembly, the-tannedterminals may be placed alternately ataoppo'site sides, giving ease'l and-p convenience -insoldering or connecting the leads 52 thereto ffiand. Without.- different mounted-.positions of each lcontact spring,

saidcontact springs being :all adapted Ato'bestacked-in 'alignment so :that the common screws 15y inay. extend through both apertures of each.

In Fig. 6, I have shown the manner of mounting the jack through its base 6 upon a table or generally horizontal plate 22 and, at the same time, I have shown in this figure a panel 36 secured to the leg 7 in the manner already set out in connection with the other figures, so that the panels 22 and 36 are thereby connected through the jack frame. The jack frame thereby performs not only the functions of supporting the contact springs, receiving the plug, and mounting the jack, but performs the additional function of firmly joining two panels such as are commonly presented at the corner of the cabinet or box of the instrument.

Vhile I have referred to the element 50 as a transformer, it is to be understood that it is merely illustrative of any element or group of elements that may be mounted upon the panel 23 and connected to the underlying spring contacts of the jack and while I have described certain particular uses of the jack, it is to be understood that said jack may be employed wherever found desirable and I do not intend to be limited to the precise details shown or described.

I claim:

l. In combination, an angular jack frame comprising a base and a thimble leg, said base having an offset portion between its ends forming a seat for contact springs, and having means on each side of said offset portion for fastening the base to a plate.

2. As an article of manufacture comprising an angular jack spring having a base and a thimble leg, a section of said base intermediate its end being offset to form a. Contact spring supporting seat, contact springs secured against the outside of said section, said base being adapted to be mounted on a panel at opposite sides of said oil'set portion.

3. In combination, an angular jack frame comprising a base and a thimble leg, a plug thimble secured at its inner end to said thimble leg, a flange integral with said thimble forming an abutment for said leg, the outer end of said thimble being threaded, said thimble being adapt-ed to support said ack frame and panels of different thicknesses, said panels having openings therein to receive said thimble, and panel used abutting against said leg and said openings being of a diameter to snugly lit said thimble flange, washers adapted to fit over said thimble and engage with the panel, a nut adapted to be threaded on said thimble to secure said jack frame to said panel, said thimble ange being of less width than the length of the panel opening, whereby said jack frame may be secured to panels of different thicknesses, and jack springs secured to the jack frame base in alignment with said thimble.

In witness whereof, I hereunto subscribe my name this 26 day of November, 1924.

HERBERT H. FROST. 

